package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.EmployeeUpdatePasswordDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;


import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.Objects;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //对传入的密码进行SHA-256加密再与数据库的密码进行比较
        if (password != null && !password.isEmpty()) {
            password = DigestUtils.sha256Hex(password.getBytes(StandardCharsets.UTF_8));
            if (!password.equals(employee.getPassword())) {
                //密码错误
                throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
            }
        } else {
            //密码为空或者为null
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }
        if (Objects.equals(employee.getStatus(), StatusConstant.DISABLE)) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /*新增员工*/
    @Override
    public void add(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        //对123456密码进行sha256加密
        String password = DigestUtils.sha256Hex(PasswordConstant.DEFAULT_PASSWORD);
        employee.setPassword(password);
        //设置用户为启用状态
        employee.setStatus(StatusConstant.ENABLE);
        //保存到数据库
        employeeMapper.insert(employee);
    }

    //员工分页条件查询
    @Override
    public PageResult queryPageOnConditional(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.queryPageOnConditional(employeePageQueryDTO.getName());
        return new PageResult(page.getTotal(), page.getResult());
    }

    //启用禁用员工
    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .build();
        employeeMapper.update(employee);
    }

    //根据id查询员工
    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.selectById(id);
        employee.setPassword("********");
        return employee;
    }

    //修改员工
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        employeeMapper.update(employee);
    }

    //员工修改密码
    @Override
    public void updatePassword(EmployeeUpdatePasswordDTO employeeUpdatePasswordDTO) {
        //对新密码进行sha256加密
        String password = DigestUtils.sha256Hex(employeeUpdatePasswordDTO.getNewPassword());
        //封装employee实例
        Employee employee = Employee.builder()
                .id(BaseContext.getCurrentId())
                .password(password)
                .build();
        employeeMapper.update(employee);
    }

}
